Title:
Effects of Shrinkage-Reducing Admixtures on Restrained Shrinkage Cracking of Concrete
Author(s):
S. P. Shh, M. E. Krguller, and M. Sarigaphuti
Publication:
Materials Journal
Volume:
89
Issue:
3
Appears on pages(s):
289-295
Keywords:
admixtures; compressive strength; cracking (fracturing); fibers; metal fibers; polypropylene; porosity; reinforced concrete; shrinkage; welded wire fabric; Materials Research
DOI:
10.14359/2593
Date:
5/1/1992
Abstract:
Presents a study of the efficiency of shrinkage-reducing admixture (SRA) in controlling restrained shrinkage cracking of concrete. Three different types and amounts of SRA were used. A free shrinkage test and a restrained shrinkage test (ring test) were performed. The test results of the SRA concretes were compared with concrete reinforced with steel, polypropylene fibers, and wire mesh. At the same time, using free shrinkage specimens, weight losses were measured. Pore-size distribution was determined and the flow rate of fresh concrete was also measured. The results show that the addition of SRA significantly reduces free shrinkage. The addition of shrinkage-reducing admixtures also caused a considerable reduction in crack width.